18404130 has 16 divisors (see below), whose sum is σ = 44169984. Its totient is φ = 4907760.

The previous prime is 18404083. The next prime is 18404137. The reversal of 18404130 is 3140481.

It is a junction number, because it is equal to n+sod(n) for n = 18404097 and 18404106.

It is not an unprimeable number, because it can be changed into a prime (18404137) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 306706 + ... + 306765.

It is an arithmetic number, because the mean of its divisors is an integer number (2760624).

Almost surely, 2^18404130 is an apocalyptic number.

18404130 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

18404130 is an abundant number, since it is smaller than the sum of its proper divisors (25765854).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

18404130 is a wasteful number, since it uses less digits than its factorization.

18404130 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 613481.

The product of its (nonzero) digits is 384, while the sum is 21.

The square root of 18404130 is about 4290.0034965021. The cubic root of 18404130 is about 264.0209751470.

The spelling of 18404130 in words is "eighteen million, four hundred four thousand, one hundred thirty".